一种基于混合系统滤波器的NCS系统故障诊断方法

针对一类具有随机传输时滞的网络化控制系统,在考虑时滞无界的情况下(最坏网络传输),提出了一种基于故障检测滤波器的故障诊断方法。首先,为了处理系统的内采样特性,根据混合系统理论设计了一种基于观测器的混合系统故障检测滤波器(FDF);利用多目标优化技术,将故障检测滤波器的设计问题转化为一类优化问题,并借助线性矩阵不等式方法给出了该优化问题的时滞独立解。最后通过仿真验证了该方法的有效性。

Approach to fault diagnosis of networked control systems based on hybrid filter

Considering the unbounded time delay(the worst-case transmission),a fault diagnosis scheme is proposed for a class of networked control systems with random transmission delay,which is based on fault detection filter(FDF).First,in order to cope with the intersample behavior,the observer-based hybrid fault detection filter is designed by employing hybrid system theory.Then using a multiobjective optimization technique,the FDF design problem is formulated as an optimization problem.The delay-independent solutions of the problem are also given by applying linear matrix inequality approach.Finally,an example is given to demonstrate the effectiveness of the proposed approach.